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The relationship between pressure and leakage air flow rate is defined by the power law between the airflow rate and the pressure difference across the building envelope as follows: [16] q L =C L ∆p n. where: q L is the volumetric leakage airflow rate expressed in m 3 h −1; C L is the air leakage coefficient expressed in m 3 h −1 Pa −n
NFRC labels provide performance ratings for such products in five categories: U-value, Solar Heat Gain Coefficient, Visible Transmittance, Air Leakage, and Condensation Resistance. [1] This allows architects, builders, code officials, contractors, home owners, and specifiers to compare the energy efficiency among products, and determine whether ...
Leakage area estimates can also be normalized for the size of the enclosure being tested, For example, the LEED Green Building Rating System has set an airtightness standard for multi-family dwelling units of 1.25 square inches (8.1 cm 2) of leakage area per 100 square feet (9.3 m 2) of enclosure area, to control tobacco smoke between units.
The American Public Works Association publication, Special Report #62, describes the use and value of facility condition rating systems in Chapter 3.6. Within the US Federal Government, the "condition index" (CI) is a general measure of the constructed asset's condition at a specific point in time. [ 2 ]
Domestic roof construction may also be ventilated to help remove moisture from leakage and condensation. Walls do not get as severe water exposure as roofs but still leak water. Types of wall systems with regard to water penetration are barrier , drainage and surface-sealed walls . [ 5 ]
The Construction Specifications Institute (CSI) is a United States national association of more than 6,000 construction industry professionals who are experts in building construction and the materials used therein. The institute is dedicated to improving the communication of construction information through a diversified membership base of ...
Floor Area ratio is sometimes called floor space ratio (FSR), floor space index (FSI), site ratio or plot ratio. The difference between FAR and FSI is that the first is a ratio, while the latter is an index. Index numbers are values expressed as a percentage of a single base figure. Thus an FAR of 1.5 is translated as an FSI of 150%.
Property condition assessments (PCAs) (also known as the property condition report, or PCR) are due diligence projects associated with commercial real estate.Commercial property and building inspections are important for clients seeking to know the condition of a property or real estate they may be purchasing, leasing, financing or simply maintaining.